update ms2 for macosx build

README.macos

@@ -30,7 +30,7 @@ Compile:
  $ sudo make install
 
 When this version will be integrated into macports, only this will be necessary:
- $ port install sdl-devel
+ $ port install libsdl-devel
 
 - Install gtk. It is recommended to use the quartz backend for better integration.
  $ port install cairo +quartz +no_x11

mediastreamer2 @ 0d6911fa

-Subproject commit 502db41537d8f39cacf7ba0b17fc2011db745fed
+Subproject commit 0d6911fac054d2a30e916e01b80cc9bc7220dbd5